We needed an operating system at Seattle Computer for our own computers and I wanted to do one. So we decided to go for it. I was waiting for Digital [Research] to come out with CP/M-86. I thought they would have it real soon. If they had beat me I wouldn't have taken the trouble. I had always wanted to write my own operating system. I've always hated CP/M and thought I could do it a lot better.

Hunter, David (1983). "The Roots of DOS". Retrieved on 2007-06-18.